[CLD-7567] Deprecate Self Serve: Second Pass (#26853)

* Deprecate Self Serve: First Pass

* Fix ci

* Fix more ci

* Remmove outdated server tests

* Fix a missed spot opening purchase modal in Self Hosted

* Fix i18n

* Clean up some more server code, fix webapp test

* Fix alignment of button

* Fix linter

* Fix i18n server side

* Deprecate in product true up

* Add back translation

* Remove client functions

* Put back client functions

* webapp deprecation

* Deprecate Self Serve: Second Pass

* Fix various pipeline issues

* Fix linter

* Fix pipelines

* Fix handlers_test.go

* Fix console.error around hostedCustomer in reducer

* PICKY LINTER PLEASE

* Fix webapp tests, various other fixes for the CI pipelines

* Fix i18n

* Updates to accomadate enterprise code removal

* Fix mocks

* More removal

* Fix

* Adjustments from PR

* Fixes for QA Feedback

* Update

* Add migrations to remove true up review history

* Fix migrations check

---------

Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: maria.nunez <maria.nunez@mattermost.com>

server/public/model/config.go

@@ -403,7 +403,6 @@ type ServiceSettings struct {
 	CollapsedThreads                                  *string `access:"experimental_features"`
 	ManagedResourcePaths                              *string `access:"environment_web_server,write_restrictable,cloud_restrictable"`
 	EnableCustomGroups                                *bool   `access:"site_users_and_teams"`
-	SelfHostedPurchase                                *bool   `access:"write_restrictable,cloud_restrictable"`
 	AllowSyncedDrafts                                 *bool   `access:"site_posts"`
 	UniqueEmojiReactionLimitPerPost                   *int    `access:"site_posts"`
 	RefreshPostStatsRunTime                           *string `access:"site_users_and_teams"`
@@ -903,10 +902,6 @@ func (s *ServiceSettings) SetDefaults(isUpdate bool) {
 		s.AllowSyncedDrafts = NewBool(true)
 	}
 
-	if s.SelfHostedPurchase == nil {
-		s.SelfHostedPurchase = NewBool(true)
-	}
-
 	if s.UniqueEmojiReactionLimitPerPost == nil {
 		s.UniqueEmojiReactionLimitPerPost = NewInt(ServiceSettingsDefaultUniqueReactionsPerPost)
 	}